How to get Camera view like Top-view?
Select the camera, press AltG, AltR (Reset camera position and rotation), then press GZ (move up along Z axis) until you reach the desired height. You can consider to set the camera to Orthographic (in the properties window, with the camera selected, the little camera icon) to have your logo with no prospective distortions; in this case change the "ortographic scale" to set the "distance" of the camera, as moving it will have no influence.

Another method is, in the 3D window, press N to open the properties tab, select the camera, modify the values in the transform tab to position the camera exactly where you want.